Salmon with Chestnuts and Ginkgo Nuts

I’m rich! If only I could take my treasure, laughing, all the way to the bank: I have collected and cleaned several hundred ginkgo nuts.
What will I do with them? They certainly are on many future menus here in The Ginkgo House: I don’t think we will get tired of them. Ginkgo nuts are valued for their flavor and fortune. They are used in good luck dishes served at New Years and weddings. They are cooked in soups, stir-fries, desserts, and eaten with beer for good health.
The Chinese (later also Japanese [ginnan]) word ginkyo means “silver apricot” (gin=silver, kyo=apricot). Coincidentally, this recipe has a silver sauce (gin-an). It is a gentle dashi-based sauce thickened with cornstarch or kuzu starch (arrowroot).